QUIZ 5 IS DUE 11 DECEMBER EXAM 3 WILL BE HELD ON 10 DECEMBER TERM PROJECT IS DUE 10 DECEMBER - TURN IN IN CLASS (NOT LATER) . A Plan to Power 100 Percent of the Planet with Renewables ( Preview )
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QUIZ 5 IS DUE 11 DECEMBER
EXAM 3 WILL BE HELD ON 10 DECEMBER
TERM PROJECT IS DUE 10 DECEMBER - TURN IN IN CLASS (NOT LATER)
A Plan to Power 100 Percent of the Planet with Renewables ( Preview )
Wind, water and solar technologies can provide 100 percent of the world's energy, eliminating all fossil fuels.
Environmental issues –
Will we mess up the planet with all this “bio” stuff?
Environmental issues – Toxic Chemicals
Source: TRACE ELEMENTS AND
CONTAMINANTS, Navratil and
Source: 1998. World Resources 1998-99: Environmental change and human health.
Gg is a giga (109) gram which is 1000 metric tons
1 Pesticide, 2 Industrial Chemical, 3 Byproduct
Source: Hellweger et al., 2003
“Most Toxic Synthetic Chemical Known To Man”
Dioxin has impacted at least two major industries:
Pulp and paper – elimination of chorine bleaching
Municipal waste combustion – halted new construction
Acute toxicity of TCDD in experimental animals is ascertained on the
basis of the LD50 : the dose (in micrograms per kilogram of body
weight) that kills half of a test group.
IF DIOXIN WAS AS TOXIC FOR HUMANS AS IT IS FOR GUINEA PIGS – HOW MUCH OF THIS NASTY STUFF WOULD IT TAKE TO KILL YOU?
Lipophilic – “Fat Loving”. Concentrates in the food chain
Lipophilic – Ends up in meat and especially fish
TEQ ppt – Total equivalent (dioxin level) part per trillion
Ingestion of dioxin from typical American diet
pg – picogram – 0.000000000001 grams
Total Release = 40, 134 grams (40 kg)
Food contact paper has dioxin levels less
than 2 ppt. Industry - FDA goal.
One In A Million Risk - 400 miles of air travel
60 miles of travel by car
3/4 of a cigarette
1-1/2 minutes of rock climbing
20 minutes of being a man aged 60
The Seattle Time
28 September 2008
Dioxin in soil? South Park takes finding in stride
Paul Marshall stands Sunday in front of the home that he has been renting for about a year in the South Park area. The former asphalt plant nearby and the neighborhood around it was found to contain high levels of dioxin.
Air & Water Emissions
3 April 2007 Supreme Court Decision
Justices Say E.P.A. Has Power to Act on Harmful Gases
The Environmental Protection Agency has the authority to regulate heat-trapping gases in automobile emissions. The court further ruled that the agency could not sidestep its authority to regulate the greenhouse gases that contribute to global climate change unless it could provide a scientific basis for its refusal.